Optical measuring instrument



FIG. 1 is a left side elevation view of an optical measuring instrument according to my new design, the right side elevation view being a mirror image thereof;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is an isometric view thereof;

FIG. 6 is an elevation view thereof, and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an optical measuring instrument, substantially as shown and described. 